 World: Davis Cup - Group III - Doubles - Promotion |
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| | Dominko S./Kupcic J. | Ciumac A./Snitari I. | 2:0 (6:3, 6:3) | details | 22.06.2024 |
| | Dominko S./Kupcic J. | Cazac I./Ciumac A. | CAN. | details | 22.06.2024 |
| World: Davis Cup - Group III - Doubles - Main |
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| | Dominko S./Kupcic J. | Jovanovic P./Samardzic M. | 2:0 (6:2, 7:62) | details | 21.06.2024 |
| | Dominko S./Kupcic J. | Knezevic S./Samardzic M. | CAN. | details | 21.06.2024 |
 Slovenia: M15 Hrastnik - Doubles - Main |
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| Final | Razborsek N./Sesko Z. | Basic N./Kupcic J. | 2:0 (7:64, 6:4) | details | 08.06.2024 |
| Semi-finals | Basic N./Kupcic J. | Schifris J./Yunis F. | 2:0 (6:2, 6:4) | details | 07.06.2024 |
| Quarter-finals | Artnak B./Dimic M. | Basic N./Kupcic J. | 1:2 (61:7, 6:3, 9:11) | details | 06.06.2024 |
| 1/8-finals | Edengren K./Iakubenko V. | Basic N./Kupcic J. | WO. | details | 05.06.2024 |
| Slovenia: M15 Celje - Doubles - Main |
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| Semi-finals | Romano F./Wehnelt K. | Basic N./Kupcic J. | 2:0 (6:3, 6:3) | details | 24.05.2024 |
| Quarter-finals | Basic N./Kupcic J. | Kovac T./Puntaric N. | 2:0 (7:5, 6:3) | details | 23.05.2024 |
| 1/8-finals | Basic N./Kupcic J. | Pampanin P./Sorrentino L. | 2:0 (6:3, 6:3) | details | 22.05.2024 |
 Croatia: M15 Osijek - Doubles - Main |
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| Semi-finals | Graf D./Paty D. | Basic N./Kupcic J. | 2:1 (7:65, 64:7, 10:6) | details | 04.05.2024 |
| Quarter-finals | Brkic J./Krolo F. | Basic N./Kupcic J. | 0:2 (5:7, 0:6) | details | 02.05.2024 |
| 1/8-finals | Basic M./Simundza J. | Basic N./Kupcic J. | 0:2 (3:6, 2:6) | details | 30.04.2024 |
| Croatia: M15 Split - Doubles - Main |
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| Quarter-finals | Kupcic J./Vetrih M. | Bielinskyi V./Szajrych J. | 0:2 (5:7, 4:6) | details | 25.04.2024 |
| 1/8-finals | Mardesic D./Smolcic N. | Kupcic J./Vetrih M. | 0:2 (2:6, 1:6) | details | 25.04.2024 |
| Croatia: M15 Rovinj - Doubles - Main |
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| Quarter-finals | Mikrut L./Poljicak M. | Basic N./Kupcic J. | 2:1 (3:6, 6:1, 10:4) | details | 14.03.2024 |
| 1/8-finals | Ban I. K./Brkic J. | Basic N./Kupcic J. | 0:2 (3:6, 0:6) | details | 13.03.2024 |
| Croatia: M15 Porec - Doubles - Main |
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| 1/8-finals | Kaukovalta P./Kupcic J. | Bill A./Mikrut L. | 1:2 (2:6, 7:64, 3:10) | details | 05.03.2024 |
 Egypt: M15 Sharm ElSheikh 20 - Doubles - Main |
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| 1/8-finals | Binda A./Kupcic J. | Butulija B./Ivanov S. | 1:2 (7:5, 4:6, 5:10) | details | 12.12.2023 |
| Egypt: M15 Sharm ElSheikh 19 - Doubles - Main |
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| Quarter-finals | Binda A./Kupcic J. | Fumagalli F./Vincent Ruggeri S. | 0:2 (5:7, 4:6) | details | 07.12.2023 |
| 1/8-finals | Binda A./Kupcic J. | Maamoun K.M./Zakaryia F. | 2:0 (7:64, 6:4) | details | 05.12.2023 |
| Egypt: M15 Sharm ElSheikh 18 - Doubles - Main |
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| Semi-finals | Kroslak J./Kupcic J. | Lomakin G./Philippov E. | 0:2 (65:7, 3:6) | details | 01.12.2023 |
| Quarter-finals | Kroslak J./Kupcic J. | Beckley A./Elsayed A. | 2:1 (61:7, 6:2, 10:7) | details | 30.11.2023 |
| 1/8-finals | Dzhavakian Y./Zahraj P. | Kroslak J./Kupcic J. | 1:2 (64:7, 7:62, 7:10) | details | 28.11.2023 |
 Tunisia: M15 Monastir 44 - Doubles - Main |
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| 1/8-finals | Kupcic J./Premzl M. | Lipovsek Puches T./Otegui J. B. | 0:2 (5:7, 4:6) | details | 31.10.2023 |
 Austria: M15 Bad Waltersdorf - Doubles - Main |
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| 1/8-finals | Kremenchutskyi I./Podorozhnyi A. | Kupcic J./Premzl M. | 2:1 (3:6, 6:4, 10:7) | details | 03.10.2023 |
| Slovenia: M25 Maribor 2 - Doubles - Main |
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| Semi-finals | Mikrut L./Poljicak M. | Basic N./Kupcic J. | 2:1 (65:7, 6:1, 10:6) | details | 07.09.2023 |
| Quarter-finals | Knaff A./Rodesch C. | Basic N./Kupcic J. | 1:2 (6:3, 3:6, 9:11) | details | 06.09.2023 |
Bosnia and Herzegovina: M15 Doboj - Singles - Main
Romania: M15 Arad - Singles - Main